LU-15988 osp: don't print nid on -ESTALE

LU-15988 osp: don't print nid on -ESTALE

Osp_send_update_req() should not access import upon -ESTALE, because
this MDT may be in umount.

Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Change-Id: Ibd869e4e8da4f90ffd608a36d866264d5d552d0e
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55049
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>